• Rafael J. Wysocki's avatar
    [PATCH] swsusp: userland interface · 6e1819d6
    Rafael J. Wysocki authored
    This patch introduces a user space interface for swsusp.
    
    The interface is based on a special character device, called the snapshot
    device, that allows user space processes to perform suspend and resume-related
    operations with the help of some ioctls and the read()/write() functions.
     Additionally it allows these processes to allocate free swap pages from a
    selected swap partition, called the resume partition, so that they know which
    sectors of the resume partition are available to them.
    
    The interface uses the same low-level system memory snapshot-handling
    functions that are used by the built-it swap-writing/reading code of swsusp.
    
    The interface documentation is included in the patch.
    
    The patch assumes that the major and minor numbers of the snapshot device will
    be 10 (ie.  misc device) and 231, the registration of which has already been
    requested.
    Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
    Acked-by: default avatarPavel Machek <pavel@ucw.cz>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    6e1819d6
do_mounts_initrd.c 3.05 KB